What is llms.txt — and why your site needs one

When ChatGPT, Claude or Perplexity answer a question about your industry, they lean on what they can read and verify about you. Most websites are built for human eyeballs and Google's crawler — not for AI assistants that need clean, citable facts. llms.txt fixes that.

The idea in one sentence

llms.txt is a markdown file served at yoursite.com/llms.txt that tells AI systems, in plain language, what your business is, what it offers, for whom, and what facts about it are true — the way robots.txt tells crawlers where they may go.

What goes inside

A good llms.txt has four parts: a one-paragraph summary of the business; a facts section (founded, location, pricing, specialties — concrete and verifiable); links to your most important pages with one-line descriptions; and contact details. No marketing fluff: AI engines quote specifics, not slogans.

Does it actually work?

llms.txt is an emerging convention, not a ratified standard — but it's cheap, harmless, and increasingly read by AI crawlers. More importantly, the discipline of writing one forces the exact content AI engines need onto your site. We publish it together with classic, proven signals: open robots.txt rules for GPTBot/ClaudeBot/PerplexityBot, JSON-LD structured data and FAQ schema. Together they form your site's AI-readable layer.

How to publish one in 10 minutes

Write the file (or let a generator draft it from your site's content), upload it to your web root so it opens at /llms.txt, and reference your sitemap in robots.txt. On Next.js, drop it in the public folder; on WordPress, upload via your hosting file manager; on Wix/Squarespace, use the static file upload in SEO settings.

AnswerRank's free site grader checks whether your llms.txt, robots.txt, structured data and FAQ schema are in place — and the fix pack generates all of them from your site's own content, ready to publish.